package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.api.R;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.Result;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@RestController
@RequestMapping("/employee")
@Slf4j
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;


    /**
     * 登录操作
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public Result<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        //①. 将页面提交的密码password进行md5加密处理, 得到加密后的字符串
        String pwd = employee.getPassword();
        String password = DigestUtils.md5DigestAsHex(pwd.getBytes());

        //②. 根据页面提交的用户名username查询数据库中员工数据信息
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(wrapper);

        //③. 如果没有查询到, 则返回登录失败结果
        if (emp == null) {
            log.info("用户名或者密码错误");
            return Result.error("用户名或者密码错误");
        }

        //④. 密码比对，如果不一致, 则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            log.info("用户名或者密码错误");
            return Result.error("用户名或者密码错误");
        }

        //⑤. 查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            log.info("此账号已被禁用");
            return Result.error("此账号已被禁用");
        }

        //⑥. 登录成功，将员工id存入Session, 并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return Result.success(emp);
    }


    /**
     * 退出操作
     *
     * @param request
     * @return
     */
    @PostMapping("logout")
    public Result<Employee> logout(HttpServletRequest request) {
        //用户执行退出操作,就是把session销毁
        request.getSession().invalidate();
        return Result.success();
    }


    /**
     * 新增员工
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public Result<Employee> save(HttpServletRequest request, @RequestBody Employee employee) {
        log.info("新增员工,{}", employee.toString());
        //设置初始密码为123456
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        employee.setStatus(1);

        /*//赋值当前的登录用户
        Long employeeId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(employeeId);
        employee.setUpdateUser(employeeId);*/

        employeeService.save(employee);
        return Result.success();
    }


    /**
     * 分页查询
     *
     * @param page     页面
     * @param pageSize 页面的大小
     * @param name     需要搜所的名字
     * @return
     */
    @GetMapping("/page")
    public Result<Page<Employee>> page(Integer page, Integer pageSize, String name) {
        log.info("员工分页查询 page = {},pageSize = {} ,name = {}", page, pageSize, name);
        //构造分页条件
        Page<Employee> pageInfo = new Page<>(page, pageSize);
        //构造查询条件
        LambdaQueryWrapper<Employee> wrapper = new LambdaQueryWrapper<>();
        wrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);
        //按照更新时间倒序排序
        wrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询,返回结果
        Page<Employee> page1 = employeeService.page(pageInfo, wrapper);
        return Result.success(page1);
    }


    /**
     * 根据id进行更新,修改状态的底层就是更新
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public Result<Employee> update(HttpServletRequest request,@RequestBody Employee employee) {
        log.info("更新");

      /*  //获取当前登录用户的信息
        long employId = (long) request.getSession().getAttribute("employee");

        //更新字段
        employee.setUpdateUser(employId);
        employee.setUpdateTime(LocalDateTime.now());*/

        //根据id进行更新
        employeeService.updateById(employee);
        return Result.success();
    }



    /**
     * 根据id进行查询员工
     * 作用是编辑时在页面上可以显示员工的信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public Result<Employee> selectById(@PathVariable Long id) {
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return Result.success(employee);
        }
        return Result.error("没有查询到该员工的信息");
    }




}
